Cutter head for a trimmer

Abstract

A cutter head for a trimmer and adapted to be rotatingly driven about an axis of rotation. The cutter head has at least one cutting filament, whereby with reference to the axis of rotation the cutting filament has a radially outer cutting portion and a clamping portion disposed between the cutting portion and a retention end. The cutter head has an approximately U-shaped receiving passage that includes a first leg, a second leg, and a clamping section disposed between the legs. The retention end of the cutting filament is adapted to be guided through the first leg, and the cutting portion is adapted to be guided through the second leg. The clamping section of the receiving passage has a wedge shape that tapers toward the retention end of the cutting filament and is adapted to effect securement of the clamping portion in the clamping section.

1 . A cutter head for a trimmer, comprising: 
 a cutter head that is adapted to be rotatingly driven about an axis of rotation, wherein said cutter head is provided with at least one cutting filament, wherein with reference to said axis of rotation of said cutter head said cutting filament has a radially outer cutting portion and a clamping portion that is disposed between said cutting portion and a retention end of said cutting filament, wherein said cutter head has an approximately U-shaped receiving passage that includes a first leg, a second leg, and a clamping section that is disposed between said first leg and said second leg, wherein said retention end of said cutting filament is adapted to be guided through said first leg of said receiving passage, wherein said cutting portion of said cutting filament is adapted to be guided through said second leg of said receiving passage, and wherein said clamping section of said receiving passage has a wedge shape that tapers in a direction toward said retention end of said cutting filament and is adapted to effect securement of said clamping portion of said cutting filament in said clamping section of said receiving passage of said cutter head.    
   
   
       2 . A cutter head according to  claim 1 , wherein said first leg and said second leg of said U-shaped receiving passage are disposed at least approximately parallel to one another.  
   
   
       3 . A cutter head according to  claim 1 , wherein at least one of said legs of said U-shaped receiving passage extends approximately in a radial direction relative to said axis of rotation.  
   
   
       4 . A cutter head according to  claim 1 , wherein said cutting filament is freely movably guided in at least one of said legs of said U-shaped receiving passage.  
   
   
       5 . A cutter head according to  claim 1 , wherein said first leg of said U-shaped receiving passage that receives said retention end of said cutting filament is open in a longitudinal direction at a free end of said first leg.  
   
   
       6 . A cutter head according to  claim 1 , wherein said second leg of said U-shaped receiving passage that is adapted to guide said cutting portion of said cutting filament is embodied as a receiving groove that with reference to a radial direction is open along a longitudinal axis of said second leg.  
   
   
       7 . A cutter head according to  claim 6 , wherein said receiving groove has an approximately L-shaped cross-section with an open cross-section leg and a closed cross-section leg, and wherein proceeding from said open cross-section leg said closed cross-section leg faces away from said first leg of said U-shaped receiving passage.  
   
   
       8 . A cutter head according to  claim 1 , wherein said clamping section of said receiving passage is formed by planar clamping surfaces that are disposed in a wedge-shaped manner.  
   
   
       9 . A cutter head according to  claim 1 , wherein said wedge shape of said clamping section of said receiving passage has an opening angle of between 4° and 7°.  
   
   
       10 . A cutter head according to  claim 1 , wherein said receiving passage is formed in a molded component that is secured to a support member of said cutter head as a separate component.  
   
   
       11 . A cutter head according to  claim 10 , wherein said molded component is inserted on said support member of said cutter head in a positively engaging yet removable manner.  
   
   
       12 . A cutter head according to  claim 11 , wherein said molded component is provided with a retaining flange and is inserted radially from the inside toward the outside into said support member.  
   
   
       13 . A cutter head according to  claim 10 , wherein said support member ( 30 ) of said cutter head is provided with an introduction groove that merges into a receiving groove of said molded component.